[Rita scrunches her brow as she considers what he's saying. It makes sense, but it's also pretty disturbing. And gross, if she thinks about it too much. She'll do him a favor and switch off the flashlight, anyway.]

I probably don't need to tell you this, but you should go see a medic. Whatever the hell that... thing is, leaving it alone for too long could lead to way worse than photosensitivity and blurred vision. [In fact, they don't even know whether the damage it's doing now could be permanent or not... but saying that out loud probably won't help anything.]